// Created by zyq on 2025/2/28.
#include "iostream"

using namespace std;

// 格式
// loop:
int main() {

    int i = 0;
    a:
    cout << "a" << endl;

    if (i++ < 3) {
        goto b;
    } else {
        goto c;
    }

    b:
    cout << "b" << endl;
    goto a;

    c:
    cout << "c" << endl;

    return 0;
};